This effect is based on prior work of Matin Lotfaliei and Rob, authors of the KDE-Rounded-Corners effect, Kevinlekiller author of kwin-effect-shaders. Special thanks to Patricio Gonzalez Vivo for his daltonize shader of Lygia.

The main idea is to manipulate pixel colors with a shader for helping in color-blindness related issues.

The configuration is pretty simple, only choose the desired color correction.

You need to install development packages for your distribution first:

sudo pacman -S git cmake extra-cmake-modules base-devel
yay -S qt5-tools

sudo pamac build kwin-effect-rounded-corners-git

sudo zypper install git cmake gcc-c++ extra-cmake-modules libqt5-qttools-devel kconfigwidgets-devel kwindowsystem-devel kguiaddons-devel ki18n-devel knotifications-devel kwin5-devel libQt5Gui-devel libQt5OpenGL-devel libepoxy-devel libqt5-qtnetworkauth-devel

xbps-install git cmake make qt5-tools-devel extra-cmake-modules gettext-devel kwin-devel

nix-env -iA nixos.kde-rounded-corners

Then clone the source code and compile it:

git clone https://github.com/lliurex/kwin-colorcorrection-effect
cd kwin-colorcorrection-effect
mkdir build
cd build
cmake .. --install-prefix /usr
make
sudo make install

To activate the effect, you can now log out and log back in, or run the command below inside the build directory:

sh ../tools/load.sh

To fully uninstall the effect, run the following commands inside the build directory:

sh ../tools/unload.sh
sudo make uninstall

After each kwin package update, the effect becomes incompatible. So it won't load without a rebuild.

You can automate the re-installation by running the command below inside the build directory:

sh ../tools/install-autorun-test.sh

The command above adds a desktop file inside the autorun directory which checks if the effect is still supported, if it is not supported, it will automatically rebuild and reinstall the effect.

You can change the color correction, or disable the effect in:

[ System Settings ] --> [ Workspace Behavior ] --> [ Desktop Effects ] --> [ Color Correction Filters ]

RGB wheel without color correction

RGB wheel with protanopia_2 filter

RGB wheel with deuteranopia_3 filter

RGB wheel with tritanopia_1 filter and error correction enabled